function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

String.prototype.trim = function()
{
    return this.replace(/(^[\s]*)|([\s]*$)/g, "");
}
function $(id)
{
	return document.getElementById(id);
}
function checkSearch()
{
	var s_key = $('search_box').value.trim();
	var i_type = $('search_menu').value.trim();
	if (!s_key.length)
	{
		alert("请填写搜索关键字");
		$('search_box').focus();
		return false;
	}
	if (!i_type.length)
	{
		alert("请选择搜索范围");
		return false;
	}
	return true;
}

function ajaxRequest(sURL, fCallback, oData, bAsync) {
	var xmlHttp = null;
	if(window.XMLHttpRequest) {
		xmlHttp = new XMLHttpRequest();
		if (xmlHttp.overrideMimeType) {
		   xmlHttp.overrideMimeType('text/xml');
		}
	}else {
		var MSXML = ['MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP'];
		for(var n = 0; n < MSXML.length; n ++) {
			try{
				var xmlHttp = new ActiveXObject(MSXML[n]);        
				break;
			}
			catch(e){}
		}
	}
	if(!xmlHttp) {
		return;
	}
	xmlHttp.onreadystatechange = function() {
		if(xmlHttp.readyState == 4 && xmlHttp.status == 200) {
			if(typeof(fCallback) == "function") {
				fCallback(xmlHttp);
			}
			try {
				xmlHttp = null;
			}catch(e){}
		}
	}
	//if (sURL.indexOf("?") > 0){
		sURL += "/" + Math.random();
	//}else {
	//	sURL += "?randnum=" + Math.random();
	//}
	
	var sMethod = (null != oData) ? "POST" : "GET"; 
	xmlHttp.open(sMethod, sURL, (bAsync == null) ? true : false);
	if ('POST' == sMethod) {
		xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	}
	xmlHttp.send(oData ? oData : null);
}

function checkEmail()
{
	var fCallback = function(xmlHttp) {
		alert(xmlHttp.responseText);
	}
	var sUrl = '/index.php/Public/CheckEmail/email/' + $('email').value.trim();
	ajaxRequest(sUrl, fCallback);
}